* {
  margin: 0;
  padding: 0;
}

.container {
  width: 100%;
  height: auto;
  padding: 50px;
  box-sizing: border-box;
}

.container::after {
  content: '.';
  display: table;
  clear: both;
  visibility: hidden;
  height: 0;
}

.box {
  width: 50%;
  float: left;
  text-align: center;
}

.box img {
  display: inline-block;
}


.fadeIn[status=loaded] {
  animation: fadeIn 500ms ease-in 0ms 1;
}

@keyframes fadeIn{
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}


.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 50px;
  background-color: #fff;
  box-shadow: -4px -1px 7px 1px #000; 
}